Case studies of height structure of TID propagation characteristics using cross-correlation analysis of incoherent scatter radar and DPS-4 ionosonde data

A statistical study of internal gravity wave characteristics using the combined Irkutsk Incoherent Scatter Radar and Digisonde data

“…Using lags between electron density disturbances, observed with two IISR beams and the ionosonde, at each height we obtain a system of linear equations for the full velocity vector of TID. Methods of determining TID propagation parameters are described in detail by Medvedev et al (2009) and Ratovsky et al (2008). Processing long series of measurements requires automated ways of identifying ionospheric disturbances.…”

“…Determining the TID elevation angle can be quite a challenge because this requires measurements of disturbance vertical profiles at ionospheric heights at least at three spaced points simultaneously. This objective can be best achieved through the use of incoherent scatter radars with rapid electronic beam-steering capability or complexes of radio physical equipment with different principles of operation (Ratovsky et al, 2008;van de Kamp et al, 2014). One of the first verifications of the dispersion relation for IGW was made by Williams et al (1982).…”

“…Only with available representative statistics on TIDs propagation parameters, can we get steady-state data on wind velocity, which will allow comparison with models. The Institute of Solar-Terrestrial Physics has developed a unique complex of radio physical instruments for ionospheric research and a method for studying three-dimensional spatial-temporal structure of wave disturbances (Potekhin et al, 2008;Ratovsky et al, 2008;Medvedev et al, 2009). This method relies on data acquired by the DPS-4 ionosonde and the Irkutsk Incoherent Scatter Radar (IISR) that is able to scan in the meridional plane.…”

Ionospheric response to geomagnetic disturbances in the north-eastern region of Asia during the minimum of 23rd cycle of solar activity

“…It resulted in the blackout on the path MagadanIrkutsk for these hours. It should be noted that the wave-like changes of electron concentration during this storm were also recorded by Irkutsk incoherent scatter radar (Ratovsky et al, 2007). The relationship between the mean intensity of 630 nm emission and the D st index in the storm on 11-13 September is illustrated in Fig.…”

An analysis of the topside ionosphere parameters based on the long-duration Irkutsk incoherent scatter radar measurements

“…The Irkutsk 98 165 130 135 130 Millstone Hill 174 200 140 170 160 Arecibo <140 110 110 120 110 >140 150 130 150 130 Summer Irkutsk 78 110 95 100 100 Arecibo <140 130 110 120 110 >140 150 130 200 130 Winter Irkutsk 80 175 120 160 135 Arecibo <140 140 110 120 120 >140 160 140 150 140 Spring Arecibo <140 130 120 120 110 >140 150 140 150 130 phases of DhmF2 variations are ahead of the DNmF2 phases, and there is a noticeable anti-correlation between DhmF2 and DVSH from 11 to 16 LT. Most likely, the variations of all the parameters are the evidence of the travelling ionospheric disturbances, which were studied in detail by Ratovsky et al (2008) for this storm. Note that the range of DVSH variability (135 km) is much more than the average disturbance (13 km) and over 2.5 times larger than the median diurnal range.…”